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Spraying polyurethanes, tips! #cabinets #sprayfinish #apollo #hvlp #paintedcabinets #cupboards

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Video by The Idaho Painter

The Idaho Painter

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This video clarifies a common troubleshooting issue when spraying 1K or 2K polyurethanes: selecting the appropriate spray gun based on the material's viscosity. It explains why a siphon feed gun may fail with thick polyurethanes and recommends a gravity feed gun for better material delivery, ultimately advising to have both types available.

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We got a troubleshooting question for you. If you're spraying one or 2K polyurethanes, so I am very familiar with using a siphon feed cup. I use it all the time. I spray one or 2K polyurethanes. But if you're spraying one and 2K polyurethanes and you're having a problem doing the same thing, if they called you up, John, got you on the phone, what would be maybe one of the solutions to that problem? >> Well, as you know, Chris, there's a wide range of viscosities in urethanes these days. So my first question would be, you know, what particular urethane are you using? And most likely it's going to be too thick for a bottom cup. And that's where we would recommend the gravity cup then because the top cup or gravity allows you to use gravity as well as to pressure through the air hose to be able to push those materials into the nozzle so that you get a more uniform material delivery. I think that's one of the good reasons why you should always have a siphon feed cup and a gravity feed cup because it really depends on what coating you're using. You could be using one or the other,

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